Tensile strength of fibre-reinforced metal matrix composites with non-uniform fibre spacing
Tensile strength of fibre-reinforced metal matrix composites with non-uniform fibre spacing
复制标题
纤维间距不均匀的纤维增强金属基复合材料的拉伸强度
DOI：
10.1007/bf02385736
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发表时间：
1989
影响因子：
4.5
通讯作者：
K. Osamura
中科院分区：
文献类型：
--
作者：
Shojiro Ochiai;K. Osamura
通过蒙特卡罗计算机模拟实验，研究了非均匀纤维间距对单向纤维增强金属基复合材料强度的影响。还研究了均匀和非均匀纤维间距下基体屈服应力和纤维强度分散对复合材料强度的影响。结果表明：（1）由于纤维断裂引起的高应力集中，纤维间距不均匀的复合材料的强度低于均匀间距的复合材料的强度；（2）不均匀导致的复合材料强度的降低随着纤维强度分散的增加而增加。对于均匀间距和不均匀间距两种情况，观察到以下趋势：（a）随着基体屈服应力的增加，复合材料的强度先增加后减小；（b）当纤维强度分散度较大时，复合材料的强度对基体的屈服应力非常敏感，而当纤维强度分散度小时，则不敏感；（c）当基体屈服应力较高时，随着纤维强度分散度的增加，复合材料的强度先减小后增加，而当屈服应力为低。
The influence of non-uniform fibre spacing on the strength of unidirectional fibre-reinforced metal matrix composites was studied by means of a Monte-Carlo computer simulation experiment. The influence of yield stress of the matrix and scatter of the fibre strength on the strength of composites were also studied for both uniform and non-uniform fibre spacings. It was demonstrated that (1) the strength of composites with non-uniform fibre spacing is lower than that with uniform spacing due to the high stress concentration arising from the breakage of fibres, and (2) the reduction in strength of composites due to the non-uniformity increases with increasing scatter of fibre strength. For both cases of uniform and non-uniform spacings, the following tendencies were observed : (a) the strength of composites increases but then decreases with increasing yield stress of matrix, (b) it is very sensitive to yield stress of the matrix when the scatter of fibre strength is large but not when it is small, and (c) it decreases but then increases with increasing scatter of fibre strength when the yield stress of the matrix is high, while it decreases monotonically with increasing scatter of fibre strength when the yield stress is low.